CXA1782 SONY [Sony Corporation], CXA1782 Datasheet - Page 17

• Manufacturer Part Number: CXA1782
• Description: RF Signal Processing Servo Amplifier for CD players
• Manufacturer: SONY [Sony Corporation]

Center Voltage Generation Circuit
(Single voltage application; Connect to GND when it’s positive/negative dual power supplies.)
Maximum current is approximately ±3mA. Output impedance is approximately 50Ω.
APC Circuit
When the laser diode is driven with constant current, the optical output possesses large negative temperature
characteristics. Therefore, the current must be controlled with the monitor photo diode to ensure the output
remains constant.
GND
Vcc
10µH
Vcc
V
EE
V
EE
PD
LD
33
34
V
EE
– 17 –
10k
55k
50
1k
VC
10k
48
V
Vcc
56k
EE
VC
10k
VREF
1.25V
56k
CXA1782CQ/CR